%I A013975
%S A013975 1,0,0,0,6,504,0,0,143388,565760,0,0,18473000,51180024,0,0,818626500,
%T A013975 1912896000,0,0,20556578700,43222528000,0,0,357139677440,697599931392,
%U A013975 0,0,4764286992816,8806299845112,0,0,51954490735875,91956846489088,0,0
%N A013975 Modular form of level 4 and weight 1/2.
%H A013975 R. E. Borcherds, <a href="http://www.math.berkeley.edu/~reb/papers/">
               Automorphic forms on O_{s+2,2}(R)^{+} and generalized Kac-Moody algebras</
               a>, pp. 744-752 of Proc. Intern. Congr. Math., Vol. 2, 1994.
%F A013975 (j(4z)-852)*theta_3(z)-2*KZ(z)*E6(4z)/del_12(4z) where KZ(z) is the cusp 
               form of weight 1 3/2 given by A054891, del_12(z) is the unique cusp 
               form of weight 12.
%F A013975 Formula and more terms from Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), 
               Jan 11 2001
%Y A013975 Sequence in context: A099057 A123278 A127605 this_sequence A103520 A003395 
               A000411
%Y A013975 Adjacent sequences: A013972 A013973 A013974 this_sequence A013976 A013977 
               A013978
%K A013975 nonn
%O A013975 -4,5
%A A013975 N. J. A. Sloane (njas(AT)research.att.com).